I'm currently getting over a 1000 unique visitors a day to my travel website and thought it would be a great idea to add a forum so people can ask questions about holiday destinations so the website is more interactive. It's also a great way to generate content I guess. My site runs on Wordpress and the most popular forum for Wordpress is bbpress I think (let me know if this is the right way to go).
But will having a forum on my site like this: example.com/forum affect my seo and serps of the rest of the site? Would I be better off with a subdomain?